Vertical coupling and polarization-independent subwavelength grating beam splitter based on silicon-on-insulator

Jingjing Zhang; Junbo Yang; Huanyu Lu; Wenjun Wu; Jie Huang; Shengli Chang

doi:10.1117/12.2209534

5 November 2015 Vertical coupling and polarization-independent subwavelength grating beam splitter based on silicon-on-insulator

Jingjing Zhang, Junbo Yang, Huanyu Lu, Wenjun Wu, Jie Huang, Shengli Chang

Author Affiliations +

Proceedings Volume 9795, Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015; 979531 (2015) https://doi.org/10.1117/12.2209534
Event: Selected Proceedings of the Photoelectronic Technology Committee Conferences held June-July 2015, 2015, Hefei, Suzhou, and Harbin, China

Abstract

We describe a novel beam splitter with advantages of a single-layer, compact and vertical coupling structure, which is based on Bragg diffraction conditions and phase match equation. FDTD method is used to optimize the design of beam splitter. The result of simulation shows that both polarizations incident light are separated into two beams of nearly equal power (near 43% split and 45% split, respectively), which are coupled into opposite directions in the waveguide. For TE mode, the coupling efficiency of the right direction and the left direction are 42.54% and 43.68, respectively. That of TM mode is 46.03% and 44.07%, respectively. The power difference for two polarizations of two output port is less than 1% and 2%, in addition, 40nm and 65nm bandwidth is achieved.

Citation Download Citation

Jingjing Zhang, Junbo Yang, Huanyu Lu, Wenjun Wu, Jie Huang, and Shengli Chang "Vertical coupling and polarization-independent subwavelength grating beam splitter based on silicon-on-insulator", Proc. SPIE 9795, Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015, 979531 (5 November 2015); https://doi.org/10.1117/12.2209534

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